def create_tfidf(oversample=False, description=False):
print("Reading the data...")
if oversample:
df_train = get_oversampled_train()
else:
df_train = pd.read_csv("data/train_raw.csv")
df_test = pd.read_csv("data/test_raw.csv")
print("Creating the corpus...")
corpus_train = textacy.Corpus(lang='en',
texts=df_train['description'].tolist())
corpus_test = textacy.Corpus(lang='en',
texts=df_test['description'].tolist())
tokenized_docs_train = (doc.to_terms_list(ngrams=1,
named_entities=True,
as_strings=True)
for doc in corpus_train)
tokenized_docs_test = (doc.to_terms_list(ngrams=1,
named_entities=True,
as_strings=True)
for doc in corpus_test)
print("Generating TF-IDF...")
vectorizer = textacy.Vectorizer(apply_idf=True,
norm="l2",
min_df=4,
max_df=.95)
tfidf_train = vectorizer.fit_transform(tokenized_docs_train)
tfidf_test = vectorizer.transform(tokenized_docs_test)
tfidf_train = pd.DataFrame(tfidf_train.toarray())
tfidf_test = pd.DataFrame(tfidf_test.toarray())
if description:
pd.concat([tfidf_train, df_train['label']],
axis=1).to_csv("data/tfidf_train_description.csv",
index=False)
pd.concat([tfidf_test, df_test['label']],
axis=1).to_csv("data/tfidf_test_description.csv",
index=False)
else:
pd.concat([tfidf_train, df_train['label']],
axis=1).to_csv("data/tfidf_train.csv", index=False)
pd.concat([tfidf_test, df_test['label']],
axis=1).to_csv("data/tfidf_test.csv", index=False)
def load_vecorizer():
if not os.path.isfile(BOW_VECTORIZER_PATH):
vectorizer = textacy.Vectorizer(min_df=2, max_df=0.95, norm='l2')
with open(BOW_VECTORIZER_PATH, 'wb') as file:
log.info('Training vectorizer on data from %s...', DATA_PATH)
docs = iter_text(DATA_PATH)
vectorizer = vectorizer.fit(docs)
log.info('Vectorizer was trained, writing it here %s...',
BOW_VECTORIZER_PATH)
pickle.dump(vectorizer, file)
else:
with open(BOW_VECTORIZER_PATH, 'rb') as file:
log.info('Loading vectorizer from %s', BOW_VECTORIZER_PATH)
vectorizer = pickle.load(file)
log.info('Vectorizer was loaded from %s', BOW_VECTORIZER_PATH)
return vectorizer
def test_vectorization_and_topic_modeling_functionality(self):
n_topics = 10
top_n = 10
vectorizer = textacy.Vectorizer(
weighting='tfidf', normalize=True, smooth_idf=True,
min_df=2, max_df=0.95)
doc_term_matrix = vectorizer.fit_transform(
(doc.to_terms_list(ngrams=1, named_entities=True, as_strings=True)
for doc in self.corpus))
model = textacy.TopicModel('nmf', n_topics=n_topics)
model.fit(doc_term_matrix)
doc_topic_matrix = model.transform(doc_term_matrix)
self.assertIsInstance(doc_term_matrix, sp.csr_matrix)
self.assertIsInstance(doc_topic_matrix, np.ndarray)
self.assertEqual(doc_topic_matrix.shape[1], n_topics)
for topic_idx, top_terms in model.top_topic_terms(vectorizer.id_to_term, top_n=top_n):
self.assertIsInstance(topic_idx, int)
self.assertEqual(len(top_terms), top_n)
def vectorize(self,
weighting='tf',
min_df=0.1,
max_df=0.95,
max_n_terms=100000,
exclude_pos=['PUNCT', 'SPACE']):
'''
DESC: Creates tf/tfidf/binary matrix of textacy corpus.
weighting = (str) tf, tfidf, bindary
min_df = (float/int) exclude terms that appear in less than precentage/number of documents
max_df = (float/int) exclude terms that appear in more than precentage/number of documents
max_n_terms = (int) max terms (features) to include in matrix
exclude_pos = (lst of strs) list of POS tags to remove from vocabulary when creating matrix
--Output--
Returns creates tf/tfidf/binary matrix of textacy corpus.
'''
for doc in self.corpus:
self.terms_list.append(list(doc.to_terms_list(n_grams=1, named_entities=True, \
normalize='lemma', as_strings=True, \
filter_stops=True, filter_punct=True, exclude_pos=exclude_pos)))
self.vectorizer = textacy.Vectorizer(weighting=weighting, normalize=True, \
smooth_idf=True, min_df=min_df, max_df=max_df, max_n_terms=max_n_terms)
self.tfidf = self.vectorizer.fit_transform(self.terms_list)
return self.tfidf
def fit(self):
if self.refit:
try:
os.remove('./vectorizer.pkl')
except FileNotFoundError:
pass
try:
self.vectorized = joblib.load('vectorizer.pkl')
except Exception as e:
vectorizer = textacy.Vectorizer(weighting='tfidf',
normalize=True,
smooth_idf=True,
min_df=10,
max_df=0.95,
max_n_terms=10000)
self.vectorized.doc_term_matrix = vectorizer.fit_transform(
(self.preprocess(doc) for doc in self.text_))
self.vectorized.feature_names = vectorizer.feature_names
self.vectorized.vectorizer = vectorizer
open('keywords.txt', 'w').write(str(vectorizer.feature_names))
joblib.dump(self.vectorized, 'vectorizer.pkl')
def start_cluster_batch():
topic_list_query = "SELECT * from sharelock.topic_list"
topic_rows = session.execute(topic_list_query)
topic_row_list = list(topic_rows)
topic_frames = pd.DataFrame(topic_row_list)
for idx, frame in topic_frames.iterrows():
topic = frame['topic']
category = frame['category']
query = "SELECT * from sharelock.active_tweets where topic='" + topic + "'order by inserted_at desc limit 30"
rows = session.execute(query)
ent_dict = {}
sorted_json = {}
row_list = []
for row in rows:
xd = json.loads(row.tweet_batch)
row_list = row_list + xd
sorted_result = df = pd.DataFrame(data=row_list)
sorted_result.set_index('tweet_id')
sorted_result = sorted_result.drop_duplicates(subset='tweet_id',
keep='first')
# Clean results by dropping items with similarity score o.98 or higher
sorted_result['tweet_tokens'] = sorted_result['tweet_text'].apply(nlp)
sorted_result['tweet_clean_text'] = sorted_result['tweet_text'].apply(
get_cleaned_text)
sorted_result['tweet_clean_tokens'] = sorted_result[
'tweet_clean_text'].apply(nlp)
sorted_result = remove_duplicate_posts(sorted_result)
corpus = textacy.Corpus(lang="en_core_web_lg",
texts=list(sorted_result['tweet_text']),
metadatas=list(sorted_result['tweet_id']))
terms_list = (doc.to_terms_list(ngrams=(1, 2, 3),
named_entities=True,
normalize=u'lemma',
lemmatize=True,
lowercase=True,
as_strings=True,
filter_stops=True,
filter_punct=True,
min_freq=1,
exclude_pos=("PRON", "X", "PUNCT",
"SYM")) for doc in corpus)
vectorizer = textacy.Vectorizer(tf_type='linear',
apply_idf=True,
idf_type='smooth')
textacy.text_utils.clean_terms(terms_list)
doc_term_matrix = vectorizer.fit_transform(terms_list)
num_topics = int(len(sorted_result) / 10)
model = textacy.tm.TopicModel('nmf', n_topics=num_topics)
model.fit(doc_term_matrix)
doc_topic_matrix = model.transform(doc_term_matrix)
topic_cluster = {}
for topic_idx, top_terms in model.top_topic_terms(
vectorizer.id_to_term, topics=-1, top_n=8, weights=True):
dct = dict(top_terms)
tt_list = []
for j in dct.keys():
tt_list.append({"term": j, "weight": dct[j]})
topic_cluster["topic-" + str(topic_idx)] = {"terms": tt_list}
for topic_idx, top_docs in model.top_topic_docs(doc_topic_matrix,
topics=-1,
top_n=6,
weights=True):
dct = dict(top_docs)
tweet_in_topic_list = []
for j in dct.keys():
query_str = "tweet_id=" + corpus[j].metadata
curr = sorted_result[sorted_result['tweet_id'] ==
corpus[j].metadata]
curr_frame_row = curr.iloc[0]
is_attached_to_topic = False
for prev_topic in topic_cluster:
if 'tweets' in topic_cluster[prev_topic]:
tweet_list = topic_cluster[prev_topic]['tweets']
for tweet in tweet_list:
if tweet['tweet_id'] == curr.iloc[0]['tweet_id']:
is_attached_to_topic = True
break
if not is_attached_to_topic:
tweet_in_topic_list.append({
"tweet_id":
curr.iloc[0]['tweet_id'],
"tweet_text":
curr.iloc[0]['tweet_text'],
"user_score":
str(curr.iloc[0]['user_score']),
"raw_score":
str(curr.iloc[0]['raw_score'])
})
if tweet_in_topic_list:
topic_cluster["topic-" +
str(topic_idx)]['tweets'] = tweet_in_topic_list
for curr_topic in topic_cluster:
if 'tweets' in topic_cluster[curr_topic]:
sent_weights = []
for tweet in topic_cluster[curr_topic]['tweets']:
sent_weights = sent_weights + get_sent_weights(
tweet, topic_cluster[curr_topic]['terms'])
sent_weights = sorted(sent_weights,
key=lambda x: x['final_score'],
reverse=True)
top_sents = sent_weights[0:2]
sorted_top_sents = sorted(sent_weights,
key=lambda x: x['ent_score'],
reverse=True)
topic_title = ""
topic_title_list = []
for sent in sorted_top_sents:
if sent['structure_penalty'] < 50 and sent[
'word_score'] > 0:
topic_title_list.append(sent['text'].strip('\n'))
topic_cluster[curr_topic]['title'] = topic_title_list
result_dict = {}
for k in topic_cluster.keys():
if 'tweets' in topic_cluster[k]:
result_dict[k] = topic_cluster[k]
insert_at = datetime.datetime.now().timestamp()
insert_values = [topic, category, insert_at, json.dumps(result_dict)]
sql_query = "INSERT into sharelock.topic_clusters (topic, category, inserted_at, tweet_cluster) values (?, ?, ?, ?)"
try:
prepared = session.prepare(sql_query)
session.execute(prepared, (insert_values))
except Exception as e:
print(e)
def compute(corpus, tick=utility.noop, method='sklearn_lda', vec_args=None, term_args=None, tm_args=None, **args):
tick()
vec_args = utility.extend({}, DEFAULT_VECTORIZE_PARAMS, vec_args)
terms = [ list(doc) for doc in textacy_utility.extract_corpus_terms(corpus, term_args) ]
fx_terms = lambda: terms # [ doc for doc in textacy_utility.extract_corpus_terms(corpus, term_args) ]
perplexity_score = None
coherence_score = None
vectorizer = None
doc_topic_matrix = None
doc_term_matrix = None
documents = textacy_utility.get_corpus_documents(corpus)
if method.startswith('sklearn'):
vectorizer = textacy.Vectorizer(**vec_args)
doc_term_matrix = vectorizer.fit_transform(fx_terms())
model = textacy.TopicModel(method.split('_')[1], **tm_args)
model.fit(doc_term_matrix)
tick()
doc_topic_matrix = model.transform(doc_term_matrix)
tick()
id2word = vectorizer.id_to_term
bow_corpus = gensim.matutils.Sparse2Corpus(doc_term_matrix, documents_columns=False)
# FIXME!!!
perplexity_score = None
coherence_score = None
elif method.startswith('gensim_'):
algorithm = method.split('_')[1].upper()
id2word = gensim.corpora.Dictionary(fx_terms())
bow_corpus = [ id2word.doc2bow(tokens) for tokens in fx_terms() ]
if args.get('tfidf_weiging', False):
# assert algorithm != 'MALLETLDA', 'MALLET training model cannot (currently) use TFIDF weighed corpus'
tfidf_model = gensim.models.tfidfmodel.TfidfModel(bow_corpus)
bow_corpus = [ tfidf_model[d] for d in bow_corpus ]
algorithms = setup_gensim_algorithms(corpus, bow_corpus, id2word, tm_args)
engine = algorithms[algorithm]['engine']
engine_options = algorithms[algorithm]['options']
model = engine(**engine_options)
if hasattr(model, 'log_perplexity'):
perplexity_score = model.log_perplexity(bow_corpus, len(bow_corpus))
try:
coherence_model_lda = gensim.models.CoherenceModel(model=model, texts=fx_terms(), dictionary=id2word, coherence='c_v')
coherence_score = coherence_model_lda.get_coherence()
except Exception as ex:
logger.error(ex)
coherence_score = None
processed = topic_model_utility.compile_metadata(
model,
bow_corpus,
id2word,
documents,
vectorizer=vectorizer,
doc_topic_matrix=doc_topic_matrix,
n_tokens=200
)
model_data = types.SimpleNamespace(
topic_model=model,
id2term=id2word,
bow_corpus=bow_corpus,
doc_term_matrix=doc_term_matrix,
#doc_topic_matrix=doc_topic_matrix,
#vectorizer=vectorizer,
processed=processed,
perplexity_score=perplexity_score,
coherence_score=coherence_score,
options=dict(method=method, vec_args=vec_args, term_args=term_args, tm_args=tm_args, **args),
coherence_scores=None
)
tick(0)
return model_data
for sgr in singlerank:
print(sgr)
print("==textrank==")
for sgr in textrank:
print(sgr)
print("==key_terms_from_semantic_network==")
for trip in key_terms_from_semantic_network:
print(trip)
print("==matches==")
for match in matches:
print(match)
print("\n")
vectorizer = textacy.Vectorizer(weighting='tfidf',
normalize=True,
smooth_idf=True,
min_df=3,
max_df=0.95)
doc_term_matrix = vectorizer.fit_transform(
(doc.to_terms_list(ngrams=1, named_entities=True, as_strings=True)
for doc in corpus))
print(repr(doc_term_matrix))
models = ['nmf', 'lda', 'lsa']
for m in models:
model = textacy.TopicModel(m, n_topics=10)
model.fit(doc_term_matrix)
doc_topic_matrix = model.transform(doc_term_matrix)
print("==", m, "==")
print(doc_topic_matrix.shape)
for topic_idx, top_terms in model.top_topic_terms(
nlp = spacy.load('en')
debates = []
data = csv.reader(open('../debate_csvs/HanDeSeT.csv', 'r'))
for row in data:
# adapted for handeset which features 7 columns of text per document (row)
debates.append(
[row[1], row[6] + row[7] + row[8] + row[9] + row[10] + row[11]])
df = pd.DataFrame(debates, columns=['title', 'text'])
chat_concat = (df.sort_values('title').groupby('title')['text'].agg(
lambda col: '\n'.join(col.astype(str))))
docs = list(chat_concat.apply(lambda x: nlp(x)))
corpus = textacy.corpus.Corpus(nlp, docs=docs)
vectorizer = textacy.Vectorizer(tf_type='linear',
apply_idf=True,
idf_type='smooth',
norm='l2',
min_df=2,
max_df=5)
doc_term_matrix = vectorizer.fit_transform(
(doc.to_terms_list(ngrams=1, named_entities=True, as_strings=True)
for doc in corpus))
model = textacy.TopicModel('nmf', n_topics=10)
model.fit(doc_term_matrix)
doc_topic_matrix = model.transform(doc_term_matrix)
for topic_idx, top_terms in model.top_topic_terms(vectorizer.id_to_term,
top_n=10):
print('topic', topic_idx, ':', ' '.join(top_terms))
